Siding replacement - and what is behind the old stuff
Whether yours is genuinely finished, what the crew finds when it comes off, and how the in-home close works before someone is sitting at your kitchen table.
What is siding replacement?
Siding replacement means stripping the existing cladding off the walls, inspecting and repairing what is behind it, renewing the water-resistive barrier, and installing new siding and trim. The re-side itself is well-understood work. The part that moves the price is invisible until day one: nobody, including your contractor, knows the condition of your sheathing and water barrier until the old siding is off the wall.
Signs you need siding replacement
- Panels are cracked, split, buckled or hanging loose across whole elevations rather than in isolated spots
- You can push a screwdriver into the wall sheathing behind a damaged area, or the wall sounds and feels soft
- Paint on wood or fiber cement is failing again within a year or two of a repaint, which usually means moisture is coming from behind rather than weather from in front
- Interior signs - musty smells on an exterior wall, staining below windows, or peeling paint inside on an outside wall
- The colour has faded unevenly to the point where any repair panel will be visibly wrong, which is a real constraint rather than a cosmetic complaint
- Repeated repairs in the same area, which almost always means the water barrier or flashing behind the siding has failed rather than the siding itself
- You are already re-roofing, re-windowing or adding exterior insulation, which is the cheapest moment a re-side will ever be
Seeing something not on this list? Browse siding problems by symptom →
How siding replacement actually works
Establishing whether it is really a replacement
Look for the difference between damage and a system failure. Isolated cracked panels on an otherwise sound wall are a repair. Failure across whole elevations, or damage that keeps recurring in one place, points at what is behind the siding.
Watch forA whole-house recommendation made from the driveway. Anyone recommending a re-side should be able to say what they think is behind the siding and why - not just that the outside looks tired.
Measurement and the quote
A real quote is built from wall square footage, opening count, storey height, trim linear footage, and the specific material and profile. Access, landscaping and how many corners the house has all move the labour.
Watch forA price given before anyone has measured, or a total with no breakdown between material, labour, trim and disposal. You cannot compare two of those, and you cannot tell later what a change should cost.
The tear-off - and the contingency you should have budgeted
The old siding comes off in sections. This is the first and only time anyone sees the sheathing, the water-resistive barrier, the flashing at windows and doors, and any rot or insect damage. Some of it will need work on most older houses.
Watch forA quote with no stated contingency and no unit price for repairs. Agree in advance what a sheet of replacement sheathing costs and what the hourly rate for repair work is, in writing. Otherwise the moment of maximum leverage for the contractor is the moment your walls are open - and that is a bad time to negotiate.
Sheathing repair and the water-resistive barrier
Damaged sheathing is cut out and replaced. Then the entire wall gets a new water-resistive barrier - house wrap or a building paper - lapped shingle-style so every upper piece overlaps the one below, taped where the system calls for it, and integrated with window and door flashing.
Watch forNew siding going over old house wrap, or over none at all. The barrier is the actual waterproofing of your wall; the siding is a rain screen in front of it. Re-siding without renewing the barrier is the most expensive way to leave the underlying problem exactly where it was.
Flashing and penetrations
Head flashing over windows and doors, kick-out flashing where a roof edge meets a wall, and correct detailing at every hose bib, vent, light and electrical box. These junctions are where nearly all wall water intrusion begins.
Watch forSealant used as a substitute for flashing. Caulk is a maintenance item with a service life measured in a few years; flashing is a permanent detail. A wall relying on caulk to stay dry is on a countdown.
Installing the siding, with movement allowed for
Every cladding material moves with temperature and moisture, and every one has manufacturer-specified fastening, spacing and clearance requirements. Vinyl in particular hangs rather than being fixed tight, and needs clearance at openings.
Watch forPanels nailed tight. It is the single most common installation error, it voids most warranties, and it produces the wavy, buckled wall that shows up in the first hot spell. Ask the crew directly how much movement they leave.
Trim, corners and finishing
Corner posts, J-channel, starter strip, soffit and fascia, and the trim at every opening. On fiber cement and wood, joints are flashed or sealed to a specification and cut edges are primed.
Watch forUnprimed cut ends on fiber cement or wood. Every cut exposes raw material and every one needs sealing. It takes seconds during the job and is the origin of most premature edge failure.
Cleanup, magnet sweep and final walk
Old siding, offcuts and packaging are hauled away, and the site is swept for nails - including the lawn, the beds and the drive. Then walk every elevation with the contractor before final payment.
Watch forReleasing the balance before the walk. Look along each wall from an angle for waviness, check the trim reveals are consistent, and confirm the flashing above openings is visible rather than caulked over.
What does siding replacement cost?
A whole-house re-side is a five-figure project for most homes, and the spread is driven mostly by wall square footage and material choice - with vinyl at the bottom of the range and fiber cement, wood and stone veneer well above it. The cost guide breaks it down by material and home size.
See the full siding replacement cost guide - by material, size and region →
If the number is the problem, here are the ways people pay for it →
HomeMatchup does not perform siding replacement. We match you with licensed local siding pros for siding replacement. Free for homeowners — Get matched free · how we verify pros.
When siding replacement is the wrong call
When saying yes is the wrong move:
- The damage is confined to one or two elevations. Re-siding the two walls that face the weather and leaving the sheltered ones is a legitimate, common plan. The colour-match problem is the honest reason to think twice - but it is a reason to discuss, not an automatic argument for four walls.
- The siding is sound and it is only the colour you dislike. On most materials other than vinyl, painting is a fraction of the cost of replacement and buys years. Painting vinyl is a genuine option too, with two hard constraints - you generally cannot go darker without risking heat distortion, and most manufacturers do not honour warranties on painted siding.
- The real problem is a roof, a gutter or a grading issue. Water arriving at a wall from above or below will ruin new siding the same way it ruined the old. Find and fix the source first; the wall is the symptom.
- You are selling within a year or two. Siding is one of the better-recovering exterior projects at resale, but "better recovering" is not "profitable". If the driver is the sale, a thorough wash, targeted repairs and paint usually put more in your pocket than a re-side does.
- You are being pushed to sign tonight. Not a defect in your house - a defect in the offer. A price that only exists while the salesperson is in your living room was set so it could fall. Every honest siding quote survives a week.
- Nobody has told you what the contingency is. If three contractors have all quoted a firm price with no mention of what happens when rot is found, none of them has priced the job honestly. Do not start with your walls about to be opened and no agreed number for what is under them.
Types of siding replacement
| Option | What it means for you |
|---|---|
| Siding materials | Vinyl, fiber cement, engineered wood, metal, stucco and veneers - eight guides, no dealer’s thumb on the scale. |
| Siding comparisons | Vinyl vs fiber cement, insulated vs standard, repair vs replace - head to head. |
| Decision guides | Budget vs premium, repair vs replace, DIY vs pro. |
What to check when hiring for siding replacement
- What is your allowance for sheathing and water-barrier repair, and what is the unit price if we exceed it? The most important question in siding. Nobody can know what is behind your walls, so the honest answer is a stated allowance plus a per-sheet and per-hour rate agreed in advance. A firm price with no mention of this is either padded or about to become a change order.
- What water-resistive barrier are you installing, and how does it integrate with the window flashing? This is the actual waterproofing of your house. You want a specific product and a specific lapping and taping method, and you want to hear how it ties into the flashing at every opening - not "we put house wrap on".
- Will you photograph the walls after tear-off, before the new barrier goes on? It is the only chance anyone will ever have to see the condition of your sheathing. Good contractors do this as a matter of course. It also makes any subsequent repair charge verifiable rather than a matter of trust.
- Are you installing to the manufacturer’s published instructions, and will the warranty be registered? Most material warranties are conditional on documented installation practice, and improper fastening voids them. Ask who registers the warranty and get a copy of the registration, not a promise.
- Is disposal, dumpster and nail sweep included in this price? A re-side generates a great deal of waste. It is a real line item, and it is one of the most commonly excluded ones - usually discovered when the skip appears on your invoice.
- Is this price still valid in a week? Ask it plainly, and note the answer. Same-day-only pricing in a high-ticket in-home sale is a structure, not a discount, and it is the clearest signal available that the opening number was never the real one.
- Who is on the wall - your employees or a subcontracted crew - and who carries the workmanship warranty? Both models produce excellent work. What matters is knowing whose insurance covers a ladder accident on your property and who you call in year three when a panel comes loose.
Siding Replacement near you
Local pro matching for siding replacement is rolling out by metro. Enter your ZIP and we'll match you with local pros in your area today.
Often done at the same time
Guides & terms
Sources
Sources last checked
- Vinyl Siding Institute — Installation resourcesVinyl Siding InstituteRetrieved 2026-08-04Trade association installation and performance references for vinyl siding.
- Occupational Employment and Wages — Construction TradesU.S. Bureau of Labor StatisticsRetrieved 2026-08-04Labor cost context for home-services trades nationally.
Sources for figures and claims on this page.
Get siding replacement quotes
Matched siding pros. Free for homeowners.
Free · No obligation